From 0e53c5539bd71f0f938eb8d176d0a5ce5fec4bfc Mon Sep 17 00:00:00 2001
From: Galen Charlton <galen.charlton@liblime.com>
Date: Mon, 12 Nov 2007 17:13:47 -0600
Subject: [PATCH] bugfix: do not crash when searching 'default' (all) heading
 types

Signed-off-by: Chris Cormack <crc@liblime.com>
Signed-off-by: Joshua Ferraro <jmf@liblime.com>
---
 C4/AuthoritiesMarc.pm | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/C4/AuthoritiesMarc.pm b/C4/AuthoritiesMarc.pm
index 92c7fafe67..d0af4e64b4 100644
--- a/C4/AuthoritiesMarc.pm
+++ b/C4/AuthoritiesMarc.pm
@@ -653,7 +653,8 @@ sub GetAuthType {
     my ($authtypecode) = @_;
     my $dbh=C4::Context->dbh;
     my $sth;
-    if ($authtypecode){
+    if (defined $authtypecode){ # NOTE - in MARC21 framework, '' is a valid authority 
+                                # type
       $sth=$dbh->prepare("select * from auth_types where authtypecode=?");
       $sth->execute($authtypecode);
     } else {
@@ -917,7 +918,7 @@ sub BuildSummary{
           foreach my $field ($record->field('5..')) {
               $altheading.= "<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<i>see also:</i> ".$field->as_string();
           }
-          $summary .= ": ";
+          $summary .= ": " if $summary;
           $summary.=$heading.$seeheading.$altheading;
       }
   }
-- 
2.39.5